docs: def add_section(self, section):
          """
          If section exists, returns log,
          otherwise adds section and returns list of sections.
          """
          # check if section already exists
          if not self.config.has_section(section):
              self.config.add_section(section)
              # return updated sections
              return (True, self.config.sections())
          return (False, 'Section: ' + section + ' already exists')